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Topic: S-NPP Drag Make-UP (DMU) Maneuver scheduled for March 28, 2017

Date/Time Issued: March 27, 2017 20:00Z

Product(s) or Data Impacted: All S-NPP Sensor Data

Date/Time of Initial Impact: March 28, 2017 17:52Z

Date/Time of Expected End: March 28, 2017 19:59Z

Length of Outage: See Details.

Details/Specifics of Change: On March 28, 2017 at 18:18Z, S-NPP will perform a 1 second propulsive Drag Make-UP (DMU) maneuver to maintain Repeating Ground Track. Due to the DMU activities, some of the ATMS Scan Reversals will not occur. During the period of DMU preparation and activities, ATMS Scan Reversals will be manually commanded to minimize skipped reversals, but may not occur exactly at stepped latitudes and thus small data gaps may be introduced.

The following observatory systems will be affected on March 28, 2017:

15:00:00Z – 23:00:00Z ATMS Scan Reversal will be manually commanded, some reversals will be missed.

17:52:00Z – 19:59:04Z CERES in Contam-Safe mode, science data will not be available

18:02:00Z – 18:29:06Z OMPS in Decon mode, Science data will not be available

18:07:00Z - 18:30:04Z HRD will be off, data for direct broadcast users will be unavailable

18:12:00Z – 18:25:04Z S-NPP remain pointing nadir, collected data during that time period may be impacted and not disseminated

Contact Information for Further Information: ESPC Operations at ESPCOperations@noaa.gov at 301-817-3880

Web Site(s) for applicable information: N/A

This message was sent to ESPC.Notification@noaa.gov. You have been sent this and other notifications because you have opted in to receive it. If for any reason, you wish to unsubscribe, please contact ESPC Help Desk at ESPCOperations@noss.gov or (301)817-3880. Please Note: It may take up to two business days to process your unsubscribe request.

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